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tant @im t .1t @ffice a OZ'IAL. A. Howe, o-F JE RsEY oir-Y, NEW-JERSEY.

Letters Patent No. 87,171, dated Februa/ryr23, 1869.

The Schedule ''ferred to in these Lettere Pateht and making part of the same To all whom it 'ma/y concern:

Beit known that I, OZIAL A. HOWE, of J ersey City, in the county of. Hudson, and ,State of New Jersey, have. invented certain new and useful Improvements in the Art 'of Constructing Bridge-Piers; and-I do hereby declare the following to be a fum-clear, and exact description of the same, Areference being had to the anneXed drawing, making .part of this specication, in which- Figure `1 shows a top View of one plan of applying my improvement;

Figures 2 and 3 show top views of the same plan in a modified form, and with additions thereto; and

Figure 4 shows a transverse Vertical section through said plan, with an oblique addition applied tothe bot tom thereof, all of which will be more fully explained and illustrated herein.

The objectvof my invention is to facilitate the construction of submarine p i'ers.

This 'object'I accomplish by first constructing a Acrib,7 substantially of the form shown in the drawing, thoroughly stayed, orbolted together with suitable\fastenings, in the manner substantially as shown;

The crib, shown by iig'. l, is constructed of plank, around a central ring, the heels of the radiating pieces, of which there are six, being thoroughly secured to the ring by proper fastenings.

These radiating planks are braced, or stayed in the centre, by planks set between them, arranged to form parallel opposite sides, ora six-sided figure, in the form of a hexagon, and the crib7 is completed by staying, or bracing the sides of the hexagon in the centre, with radiating planks secured thereto, and joined to the ends of thelong'radiating planks by intervening pieces of plank, thoroughlysecured to each other and tol the ends of the radiating planks by any'suitable fastening.

The crib, when completed, forms a gure of twelve sides, with eighteen compartments, around Aa central hole, which shguld be made large 'enough to receive the heel Iof a flag-staff.

The bottom of these compartments, or as many of them as may be necessary, should be covered, or closed with plank or chain, thoroughly fastened to the sides of the compartments. The number of the compartments, the bottoms whereof are to be thus covered,

will depend upon the buoyancy of the f crib, and the weight necessary to sink it to the required depth.

`Now let it be desired to construct a pier. The crib;7 having been madein manner 'and form substantially as described, is first floated and` anchored in the desired place, with a iiag-staff l arranged therein,

as shown by Iig. 4.- The stone-work is th'en lled into as many of the compartments asmay bev necessary to sink the crib, the flag-stad` constantly 'indicating whether the pier is sinking on a vertical-central line from top to bottom.

The drawing shows but one horizontal section of the crib,f which consists of as many such sections as may be necessary to gain the required height.

The bottom section being first immersed, the second section is brought out and placed directly over. the first.

The stone Iilling, or masonry, is then continued, and so on until the pier has found its bearing on the bottom'. The remaining compartments are then filled up' andthe pier completed.

In case the bottom upon which the pier is to be constructed is oblique, the bottom side of the lower section of the crib's hould be made tol correspond with the Obliquity of the surface upon which it isto stand,

as illustrated in g. 4, which shows a parallel crib-A section standing upon. one, with the underside cnt to match the bottom upon which the pier is to stand.

The crib may, of course, be made of some other form than any of those shown in the drawing, igs. 2 and 3 being merely to show with what facility the form can be modified.

Having now described the nature ardextent of my invention,

I claim as new herein, and desire to secure by Letters Patent- Gonstructinga submarine pier of masonry, or stonework, of thedesired form and extent, by means of a series of ioatin g cribs, constructed substantially as de. scribed, and divided in compartments, around a central ring, said series 'of cribs to be united, filled, and

sunk, as set forth.

V OZIAL A. HOWE. Witnesses: v

EDWARD P. FLINT, Amos BROADNAX. 

